libcrypto: add header guards to *_local.h

An upcoming change requires the inclusion of asn1_local.h in x509_local.h
which doesn't work due to missing header guards. Add guards to all local
headers that don't have them, although reacharounds and multiple inclusions
are unlikely to occur for most of those.

ok jsing

1 files changed, 6 insertions, 1 deletions

diff --git a/src/lib/libcrypto/modes/modes_local.h b/src/lib/libcrypto/modes/modes_local.h
index 5c1acfc25f..df699d3e4c 100644
--- a/src/lib/libcrypto/modes/modes_local.h
+++ b/src/lib/libcrypto/modes/modes_local.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: modes_local.h,v 1.7 2025/07/13 06:01:33 jsing Exp $ */
+/* $OpenBSD: modes_local.h,v 1.8 2025/11/26 10:19:57 tb Exp $ */
 /* ====================================================================
  * Copyright (c) 2010 The OpenSSL Project.  All rights reserved.
  *
@@ -6,6 +6,9 @@
  * ====================================================================
  */
 
+#ifndef HEADER_MODES_LOCAL_H
+#define HEADER_MODES_LOCAL_H
+
 #include <endian.h>
 
 #include <openssl/opensslconf.h>
@@ -61,3 +64,5 @@ struct ccm128_context {
 };
 
 __END_HIDDEN_DECLS
+
+#endif /* HEADER_MODES_LOCAL_H */